1
vote
0answers
54 views

Is it safe to derive ephmeral keys by hashing a curve25519 key and a sequential number?

My understanding of curve25519 is that a key is derived solely from Alice's private key and Bob's public key and that curve25519 will always yield the same shared secret $K_s$ for the same keys. Now, ...
3
votes
2answers
173 views

Perfect Forward Secrecy with Pre-shared Key

I've recently been looking at how to do perfect forward secrecy on a unidirectional connection (server can only push messages to client, client cannot respond). What I've come up with is the idea of ...
2
votes
2answers
311 views

What are the potential security impacts of using CRAM-MD5 for Emails, when not using an SSL connection?

Background: My current server-provider tells me it's no problem to store the passwords in plain-text in the database, saying he has to do so because they use CRAM-MD5 for email authentication. But ...
5
votes
2answers
321 views

Can I use a key-derivation-function as the hash function H in SRP?

In the Secure Remote Password Protocol, the verifier must be stored on the server. In the case of a server compromise, an attacker could obtain these verifiers. If nobody reused passwords, this ...